validating user input

[roshanjameer]

hi,

i have a form which contains some textboxes for name,email,phone,address.the user will enter some values in that.i want to validate them.how to do it.i want to validate the user so that he can enter name in name textbox and number in phone textbox and in email.could you please tell me how to validate this.
thanks
mrjameer

[bpat1434]

Look at the user-notes of [man]eregi/man for a pretty complete E-Mail validator.

As for the name and phone-number, you can just do a quick preg_match:

$name = $_POST['name'];
$phone = $_POST['phone'];

if(preg_match('/[0-9]/i', $name))
  // Name contains numbers, probably isn't a name
if(preg_match('/[^0-9\(\).\s-]/i', $phone)) // match numbers like: (123)456 - 1234, 123.123.1234
  // Phone contains something not normal